Talk show host and dance superstar Ellen DeGeneres surprised viewers everywhere with an unannounced appearance on Thursday's finale of "So You Think You Can Dance."

Ellen, who loves to bust a move daily on her own show, agreed to dance alongside tWitch in place of Alex Wong, who left the competition early due to a ruptured Achilles tendon.

Check out Ellen's impressive dancing!

After her performance, DeGeneres told a cheering audience, "It doesn't matter if you have ever had a dance class in your life, which I haven't, maybe you couldn't tell. But everybody should do this, it is so much fun."